Malicious PDF — malware analysis report

Static analysis result for SHA-256 18e3b448bd3875e9…

MALICIOUS

PDF

74.8 KB Created: 2021-04-13 15:52:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: f7a42e85d6cf5143ba14cdf6869a7982 SHA-1: e7ab2d61bdca7d19ea8c74d1b4a14622350f25f6 SHA-256: 18e3b448bd3875e9b291c6495f32dcf1d74ba117f16a30dd102eabf15b8b4045
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is a PDF containing an embedded URL that points to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also flagged this PDF with high confidence. The document body, though heavily obfuscated, contains text related to study materials, suggesting a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://golowaki.ru/strik?utm_term=sat+biology+subject+test+prep+book PDF link annotation
    • https://cdn.sqhk.co/susiwebuvowo/ibagl1q/miwuwa.pdfIn PDF document text
    • http://wamipivifubape.sportsontheweb.net/39427106927.pdfIn PDF document text
    • http://tuvurebomiworo.scienceontheweb.net/37931815529.pdfIn PDF document text
    • http://gitikirazidapi.medianewsonline.com/gubivorimobetonoga.pdfIn PDF document text
    • http://gapokaro.mywebcommunity.org/lilogusigisigolepoxu.pdfIn PDF document text
    • http://turubegu.sportsontheweb.net/75853043258.pdfIn PDF document text
    • https://cdn.sqhk.co/nepopagugela/Kgc6fjj/fall_cake_decorating_pictures.pdfIn PDF document text
    • https://cdn.sqhk.co/wexufenu/hridI7v/49012412121.pdfIn PDF document text
    • http://zesegalos.scienceontheweb.net/gagodenogam.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d622dd0-f263-488b-bc8e-3667b2c50cc5/99857273323.pdfIn PDF document text
    • http://zisukuvi.atwebpages.com/criminal_law_act_south_africa.pdfIn PDF document text
    • https://s3.amazonaws.com/wavunot/warm_bodies_movie_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/zoluwivebiro/lemawusuvogaxe.pdfIn PDF document text
    • https://s3.amazonaws.com/rafiralexezol/a_scanner_darkly_movie_download_in_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/viwoxuz/vededarizoxizovow.pdfIn PDF document text
    • https://s3.amazonaws.com/xuzed/48431083975.pdfIn PDF document text
    • http://tevefetilojas.atwebpages.com/calendario_lunar_cannabico_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b727c4b7-06a1-4f04-8122-b70c32d213a3/46125587112.pdfIn PDF document text
    • https://s3.amazonaws.com/kitakilesa/49999509386.pdfIn PDF document text
    • https://s3.amazonaws.com/vexeliku/sizusunisewo.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4AD 5584 bytes
SHA-256: d47cf9f64dfa27566a25d67108cece43fef8c75a149315b5c95e437c35460ace
font_01_sfnt_off0000f7ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7CA 11220 bytes
SHA-256: d6bc488428d5a4c6ca6f0439574acc4013bccc8cb6f8797e99415bb04e3df791

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